Current evidence suggests that the majority of patients with eating disorders will not fully recover during treatment, and little doubt can exist around the urgent need for improved treatment outcomes across the field of eating disorders. While empirical efforts are underway to optimize outcomes, this article reviews treatment-related research findings published in Eating Disorders: The Journal of Treatment & Prevention during 2018. Importantly, this review encapsulates research addressing (i) barriers to access and the uptake of empirically supported treatments, (ii) research assessing the delivery of empirically supported treatments across the full spectrum of patient care, and (iii) research aiming to isolate treatment mechanisms and optimize treatment outcomes across a transdiagnostic array of eating disorders. Ultimately, while much ground has been covered in 2018, further research is needed to enhance the accessibility and uptake existing treatments, since only a fraction of those with eating disorders are currently engaged in treatment. Further, with the expanding scope of non-outpatient eating disorder treatment settings, further research is required to adapt and assess the implementation of empirically supported treatments in higher levels of patient care. Lastly, in aiming to optimize patient outcomes, treatment outcome research must seek to identify (i) mechanisms that underlie illness eating disorder psychopathology, and (ii) the active mechanisms of existing treatments.